Steering box - Which lubricant?

I'm placeing a manual box in my car now and opened it to check it out.
Is that what is in the box now?
The FSM says to use SAE 80 and to fill it to the top of the worm gear.
How much of the grease do you use?
When I look in the box now, I can see the worm gear without any grease around it. It just has an oil residue on it.